Liftshare

If you don't have a car, but it's the best option for you, then hitching a lift may be the answer. No need for that hitchhikers thumb though, Liftshare hooks you up with people who are already heading the same way as you. Simply type in the postcodes of your departure and arrival locations, and see who can give you a lift.

Santander cycles

Yes, the Boris bike as they're more commonly known. There will be many more located in central London to help people get around, and this free app tells you where there are Boris bikes free for use, no need to trek to the cycle station only to find there are none left for hire.